Dave's 80:1 RC mid drive kit build log
- Thread starter tangentdave
- Start date
aCeMadMod
1 kW
i don"T think dave other e/s will come back now new one fails
who makes the best mid drive kit now?
who makes the best mid drive kit now?
Ecyclist
1 kW
Are you shore? I didn't know CYC is using cycloidal gearbox.Ham said:
cr0m08
1 W
Nah, last I saw, CYC X1 Pro is definitely 6:1 planetary reduction, similar principal to the mini cyclone.
Theres no doubt the X1 is a great unit, but I don't think it has the power of an Astro 3220! The X1 has a much slower KV, so I think it needs to be run at 72V instead of 48V to get the same rpm, which means more battery to carry? And their controller still seems to be troublesome with a throttle last i read? I may not be correct about the controller though?
Theres no doubt the X1 is a great unit, but I don't think it has the power of an Astro 3220! The X1 has a much slower KV, so I think it needs to be run at 72V instead of 48V to get the same rpm, which means more battery to carry? And their controller still seems to be troublesome with a throttle last i read? I may not be correct about the controller though?
aCeMadMod
1 kW
in. short dave was the best? mid drive i had a few pointers all Ti or stornger 3d now
were need A.I to make NEW drive
thank 8) you all
were need A.I to make NEW drive
thank 8) you all
Ecyclist
1 kW
And plastic gears.cr0m08 said:
Tangent had aluminum gears.
What about that one?
cr0m08
1 W
Dave did play with some aluminium gears, I used some in my gen 1 unit, but he found them too soft and went back to steel.
As I mentioned to you Ecyclist in a PM sometime ago, I don't think Dave got his calculations quite right or maybe it was the manufacture not quite accurate enough. He did say it was difficult with his machinery to get tolerances close enough, which is why he wanted to get to the point he could outsource the manufacture of the parts onto better machines. I find there is noise and some vibrations on the Tangent, which means its just not quite there, and loosing some efficiency, and getting wear it should not. It is a pity because its brilliant to ride. Also I witnessed a Sumitomo cycloidal drive working on the mine site I was on. The unit was completely silent and void of all vibrations, so it can be done and therefore have enormous efficiency, as we can see from the amp draw photos of the Avian drive running.
I am not tying to criticise Dave's Tangents, merely to say, they could be even better.
What would be fantastic, is if Ecyclist's Avian gearbox design was made for the astro 3220 somewhere between 13:1 an 19:1
Ahhhh the stuff of dreams, but I don't think that will happen
As I mentioned to you Ecyclist in a PM sometime ago, I don't think Dave got his calculations quite right or maybe it was the manufacture not quite accurate enough. He did say it was difficult with his machinery to get tolerances close enough, which is why he wanted to get to the point he could outsource the manufacture of the parts onto better machines. I find there is noise and some vibrations on the Tangent, which means its just not quite there, and loosing some efficiency, and getting wear it should not. It is a pity because its brilliant to ride. Also I witnessed a Sumitomo cycloidal drive working on the mine site I was on. The unit was completely silent and void of all vibrations, so it can be done and therefore have enormous efficiency, as we can see from the amp draw photos of the Avian drive running.
I am not tying to criticise Dave's Tangents, merely to say, they could be even better.
What would be fantastic, is if Ecyclist's Avian gearbox design was made for the astro 3220 somewhere between 13:1 an 19:1
Ahhhh the stuff of dreams, but I don't think that will happen
Ecyclist
1 kW
I will make one with 8072 outrunner. Outrunners run much cooler, produce more torque and are dirt cheap. Winter is a hobby time for me. However snowboarding is on the top of my list. I love Mammoth Mountain. 8)
aCeMadMod
1 kW
hi all in time i hope make new mid dive based on dave work and share it .
long trem goal thank you
long trem goal thank you
aCeMadMod
1 kW
hi all its odd dave website working agian?
when one use his 3 gen mid drive now its bean a few years now or update it
thank you alll
when one use his 3 gen mid drive now its bean a few years now or update it
thank you alll
Dave's mid drive is great, but it has its limitations imo.
I believe the tolerances like previously mentioned are one problem. The gear in mine is destroyed, there is a crack and the surfaces are totally misshapen.
I will be trying to mate a cyc x1Pro gearbox/crankset to my astro 3220. I expect the gearbox to hold up better than the tangent in the long run and be more readily available for repair/replacement.
I believe the tolerances like previously mentioned are one problem. The gear in mine is destroyed, there is a crack and the surfaces are totally misshapen.
I will be trying to mate a cyc x1Pro gearbox/crankset to my astro 3220. I expect the gearbox to hold up better than the tangent in the long run and be more readily available for repair/replacement.
aCeMadMod
1 kW
look like my next setup up cyc or G620
hard to pick what Revion do have to srew up the mian gaer dave gearbox
thank you alll
hard to pick what Revion do have to srew up the mian gaer dave gearbox
thank you alll
morati
10 kW
Fried my CC HV80 on my 3210 Tangent today (got it wet while doing a snowy trail ride). Castle Creations HV80's are easy enough to come by by I understand Dave used a custom made shunt for it to work properly. What are the chances I can buy a new HV80 and use the old shunt to facilitate repairs. Love my Tangent, don't want to give it up and move on.......
morati
10 kW
Much Appreciated! I'll give it a shot......knurf said:
Ecyclist
1 kW
What voltage are you running this poor thing?morati said:
Maybe it is time to build a nice waterproof case.
I'm using VESC on my kit and rode thru a typhoon in Japan without a single problem.
morati
10 kW
Animalector
10 kW
Don't you mean "a vertical milling machine AND a lathe"
Ecyclist
1 kW
For 12s you could use VESC 4.12 just fine. You might be able to use it at 14s, but not fully charged. This would make your battery last much longer. I'm waiting for a single UBOX. I think that this will be a perfect VESC for a mid power (3-4 KW) e-bike.morati said:
For now only dual UBOX is available.
You can read about it here: https://forum.esk8.news/t/spintend-75v-200a-ubox-based-on-75v-300a-vesc-and-uni1-introduction/39125
Yes, CNC mill is nice to have. The only machine I don't have is EDM.
morati
10 kW
I stand corrected.....Animalector said:
morati
10 kW
Mmmmmm looks promising if I can't get the Castle Creations ESC to work.Ecyclist said:
Curious if anyone has tried the Nucular 6F? It can run sensorless motors as well and the buy-in price isn't bad.
Ecyclist
1 kW
Just so you know, you can install sensors inside of your Astro. You can find posts on this forum how to do that.morati said:
Driveless
10 mW
- Joined
- Jul 19, 2015
- Messages
- 24
What would cause a complete lockup of the drive and can it be fixed?
Tangent V1.5, free wheel and Astro 3210 are in good working order, something is jammed up inside the tangent drive.
[Update] Tore down the drive. Looks like the bearing inside exploded. Had plenty of grease, greased every 100 miles, has about 4-500 miles on the drive. Wonder what the life of these bearing is.
Anyone know how to reach out to Dave for parts?
Tangent V1.5, free wheel and Astro 3210 are in good working order, something is jammed up inside the tangent drive.
[Update] Tore down the drive. Looks like the bearing inside exploded. Had plenty of grease, greased every 100 miles, has about 4-500 miles on the drive. Wonder what the life of these bearing is.
Anyone know how to reach out to Dave for parts?
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